# FastAPI (/zh/quickstarts/fastapi)
Related: [Node.js](/zh/quickstarts/nodejs.md), [Next.js](/zh/quickstarts/nextjs.md), [Express](/zh/quickstarts/express.md), [NestJS](/zh/quickstarts/nestjs.md), [Fastify](/zh/quickstarts/fastify.md), [Hono](/zh/quickstarts/hono.md)
## 前提条件 [#前提条件]
* Python 3.8+
* 一个 Firecrawl API 密钥——[免费获取](https://www.firecrawl.dev/app/api-keys)
## 设置 [#设置]
```bash
pip install fastapi uvicorn firecrawl-py
```
将 API 密钥添加到 `.env` 中：
```bash
FIRECRAWL_API_KEY=fc-YOUR-API-KEY
```
## 编写 API [#编写-api]
创建 `main.py`：
```python
import os
from fastapi import FastAPI
from pydantic import BaseModel
from firecrawl import Firecrawl
app = FastAPI()
firecrawl = Firecrawl(api_key=os.environ["FIRECRAWL_API_KEY"])
class SearchRequest(BaseModel):
query: str
limit: int = 5
class ScrapeRequest(BaseModel):
url: str
class InteractRequest(BaseModel):
scrape_id: str
prompt: str
@app.post("/search")
async def search(req: SearchRequest):
results = firecrawl.search(req.query, limit=req.limit)
return [{"title": r.title, "url": r.url} for r in results.web]
@app.post("/scrape")
async def scrape(req: ScrapeRequest):
result = firecrawl.scrape(req.url)
return {"markdown": result.markdown, "metadata": result.metadata}
@app.post("/interact/start")
async def interact_start(req: ScrapeRequest):
result = firecrawl.scrape(req.url, formats=["markdown"])
return {"scrape_id": result.metadata.scrape_id}
@app.post("/interact")
async def interact(req: InteractRequest):
response = firecrawl.interact(req.scrape_id, prompt=req.prompt)
return {"output": response.output}
@app.post("/interact/stop")
async def interact_stop(req: InteractRequest):
firecrawl.stop_interaction(req.scrape_id)
return {"status": "stopped"}
```
## 运行 [#运行]
```bash
uvicorn main:app --reload
```
## 试一下 [#试一下]
```bash
# 进行网页搜索
curl -X POST http://localhost:8000/search \
-H "Content-Type: application/json" \
-d '{"query": "firecrawl web scraping", "limit": 5}'
# 抓取页面
curl -X POST http://localhost:8000/scrape \
-H "Content-Type: application/json" \
-d '{"url": "https://example.com"}'
# 启动交互会话，然后发送 prompt
curl -X POST http://localhost:8000/interact/start \
-H "Content-Type: application/json" \
-d '{"url": "https://www.amazon.com"}'
```
FastAPI 会自动在 `http://localhost:8000/docs` 生成交互式文档。
## 异步变体 [#异步变体]
为在高负载下获得更好的并发性能，请使用 `AsyncFirecrawl`：
```python
from firecrawl import AsyncFirecrawl
async_firecrawl = AsyncFirecrawl(api_key=os.environ["FIRECRAWL_API_KEY"])
@app.post("/scrape-async")
async def scrape_async(req: ScrapeRequest):
result = await async_firecrawl.scrape(req.url)
return {"markdown": result.markdown}
```
## 后续步骤 [#后续步骤]
所有抓取选项，包括 formats、actions 和代理
进行网页搜索并获取完整页面内容
点击、填写表单并提取动态内容
完整的 SDK 参考，涵盖爬取、map、异步 等功能